Consider the mass spectrometer shown schematically in Figure 1. The magnitude of the electric field between the plates of the velocity selector is 2 500 V/m, and the magnetic field
in both the velocity selector and the deflection chamber has a magnitude of 0.035 0 T. Calculate
the radius of the path for a singly charged ion having a mass m = 2.18 × 10–26 kg.​

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?